import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { static BigInteger sumOfGroup(int k) { // Return the sum of the elements of the k'th group. return( BigInteger.valueOf((long)k*k*k)); } public static void main(String[] args) { Scanner in = new Scanner(System.in); int k = in.nextInt(); BigInteger answer = sumOfGroup(k); System.out.println(answer.toString()); in.close(); } }